USRE3226E - Improvement in tackle-blocks - Google Patents

Description

` of Middlescnand State ofA Connecticut, but now of `,drawings,`forn1ing part of this specification.

, as a portion or surface connected withthe block occu ings, which I have found successful in practice, and

v `Figure'2 is a. vertical section of the' same, at right angles to fig .'1, in the plane indicated by the linc x 2:, .in fig. 1. l

anni t Q ,time time ISAAC E. PALMER, or Hackensack, NEW JERSEY;

Lette/rs Patent No. 25,978, dated Nevembervl, 1859", reissue No. 1,534, dated September 8, 1863; lrfusas'ue No. 1,932, dated April '11, 1865 5 ,reissue No. 3,226, dated December 8,1868.

IMPROVEMEFTI TACKLIl-BLOCKS.

Thechedule referred te inl these Letters Patentfand making part 0f the 5mt To all whom it lmal/y concern:

Beit known that ISAAC E. PALMER, formerly of the city and county of St. Louis, State of Missouri, afterwards of Montville, county of `blew London, and State of Connecticut, and late of Middletown, county a concentric cylindrical projection, d, thev circumference groovce, and one or more portions of the lange or lip ,between the groove c and cylindrical portion d is cut away or omitted, as shown at e e', in iigs. 1, '3, 4, and 5, .to allow a portion of the rope to b'e slipped out of the groove e. when required, as will he presently explained. g

The pulley is secured in the block by a concentric pin, g, upon which it worksiu the usual manner.

Theportion u a' of the recess d a l) b', receiving the groovcd portion of the pulley, is large enough in all directions forjthat part of the pulley and the rope to work freely -within it, but the portion b b of the recess lwhich receives the cylindrical portion d of the pulley, is made very little larg'er than suiiicien't for the said Hackensack, county of Bergen, and State of New Jersey, have invented a new and useful improvement in Tackle-Blocks andPulleys; and I do hereby declare vthat the following is afull, clear,- and exact description 'of the same, reference being had to the accompanying' `This invention consists in so constructing' a tacklehlock and pulley that the rope vor fall, when desired, may be clamped between a portion of the pulley and a portion of or surface connected with the block occupying an invariable distance from the axis of the pulley, and so secured without tying or any other means of fastening, by simply leading the rope or fall, at its one end, to one side, out of or from the running groove or surface on the pulley over which said fall passes when released from gripe.

In referring to the one clamping or griping-sulface,

the rope to work between it and thc cylindricalportion of the pulley, thus establishing an eccentric character or relationship between the pulley, outside of its groove e, and surface connected with' the block, such outside portion of Vthe pulley on its periphery moves contiguous to. v Y

The operation is' as follows:

When the fall f, and other portions of the rope C, work in a plane or planes parallel with the planes of revolution ofthe shcave, the 'pulley revolves freely in the blockineither direction, butif the fall f be dimvn off obliquely, or moved in a direction lateral t'o such planes, as indicated in! red outline in fig. l, and so caused to slip through one ofthe openings, e e', in the flange pying an invariable distance from the axis of the pulley, the same is so described, in contradistinction to a dog, movable stop, or other like fastening-device, which, to effect gripe and release of the fall, changes its dis' tance or position relatively to the axis ofthe pulley.

In carrying out my invention, the surfaces of the pulley, and of the interior of the cavity provided in the block for its reception, may -bemade of various forms', but the improvement will be suilicientlyexplained by stant it is let go it will be drawn,'by the weight or strain a descriptionof-these forms, represented in .the draw on the tackle, between the end, e', of one of the said openings, and the part b of the recess d e l) l1', and so A jammedv or griped hard enough to secure it without tying, or the use of any other means. of fastening. i When power is again applied to the fall f, it at once liberates itself, by the turning of the pulley.

Y I do not confine' myself to the precise form, herein described and represented, of the pulley, or of the cavity provided in the block for its reception; but

which I consider -vcry well adapted to effect the desired result. f

Figure- 1, inthe drawing, is a iront view of the block and pulley.

Figure 3y is a vertical section, at right angles to iig. 1.

Figure 4 is a right side View of the pulley.

Figure 5 is a front view ofthe saine.

Similar letters of reference indicate corresponding parts in.t-he-fseveralfigures.`

To enable others skilled in the art to make and use my invention, 'I will proceed to describe its construction and operation with reference tothe drawings.

A is the block, made of any suitable external form, andI having provided init a recess or cavity, e a b b', for the reception of the pulley or sheave B.

by Let is Patent, isf-- The construction of a tackle-block and pulley,whereby the rope or fall, when desired, may be clamped between a lportion of the pulley anda portion of or surface connected with the block,'snbstantially as herein described,

the plane of revolution of the pulley, without tying, or the use of dogs or movable stops, or any other means of fastening.

ISAAC E. PALMER.

of the rope C -fg'and, at one side of this groove, it has of which is about equal to that of the bottom of the portion of the pulley, and not large enough to permit or lip, which` is neXtfthe cylindridtlxportion d, the in-` What claim as my invention, and desire to secure by simply leading it in a direction oblique or lateral to

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